MULTIPLE fires have started throughout the Adelaide Hills, Fleurieu Peninsula and South East as today's extreme weather conditions are replaced with thunderstorms and lightning.

8:35pm

Grass fires have broken out at Sunlands, Marama and Padthaway.

6:59pm:

Grass fires are burning at Berri, Strathalbyn, and The Gap.

6:40pm:

A uncontrolled crop fire is burning in two spots - one at Tarnma, 10km west of Eudunda, near near Tarnma Rd and Swamp Rd.

The second nearby fire at Marrabel is travelling south-east towards the Eudunda to Marrabel Rd.

6:01pm:

The CFS is monitoring an uncontrolled bushfire in scrub at Forreston in the southern Mt Lofty Ranges, near Iron Stone Rd. It is travelling east towards Warren Rd.

The CFS has warned residents to put bushfire survival plans into action and says people unprepared should leave now.

5:47pm:

The CFS is responding to fires across the Narracorte area - including Naracoorte, Cadgee, Hynam, Kyboblite, Wild Dog Valley, Mount Light, Joanna, Moyhall, and Struan. The CFS says people in those areas should check and follow their bushfire survival plans.

More information will be provided by the CFS when it is available.

5:33pm:

A fire has started near McHarg Creek on Mt Magnificent Rd in the Adelaide Hills near Stacy Rd, Ashbourne.

5:30pm:

Grass fires have started at Monarto, Lameroo, Keith and Joanna.

5:20pm:

CFS crews have been dispatched to grass fires at Reedy Creek, Padthaway, Sherlock and Mt Pleasant.

5pm:

CFS crews are responding to multiple fires in the Strathalbyn, Ashbourne and Langhorne Creek area. Residents are advised to activate their bushfire plans.